Mechanical Engineer - CMS Innermost Region (EP-CMS-ID-2026-152-LD)

Company Description
At CERN , the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature.

Introduction:
You will play a key role in the design, prototyping, construction, and integration of the mechanical structures and services for the innermost region of the CMS detector at CERN. This includes beam-pipe support structures, tracker bulkheads, beam-luminosity and beam-background monitors, and their associated services. The work will culminate in the equipment installation and commissioning at the end of the Long Shutdown 3 of the LHC.

Functions:

• Prepare 3D models and technical drawings and perform thermo-mechanical analyses of complex mechanical components and assemblies.
• Contribute to component procurement and oversee fabrication of mechanical parts, including related quality assurance.
• Lead and supervise the assembly of mock-ups, prototypes, and final versions of support structures for the CMS innermost region.
• Assist with the integration and testing of the Inner Tracker and Luminosity Monitors at CERN.
• Support and supervise colleagues from collaborating institutes participating in integration activities at CERN.

Qualifications
Master's Degree or equivalent relevant experience in the field of Mechanical Engineering or a related field.

Experience:

• Proven experience in design of complex mechanical components and assemblies using 3D CAD tools.
• Experience with structural and thermal simulations using finite-element analysis.
• Experience in construction, assembly, and quality control of mechanical systems.
• Demonstrated ability to work effectively within a multidisciplinary team, establishing and maintaining constructive and effective working relationships with a diverse range of colleagues.

Technical competencies:

• Design and analysis of mechanical structures.
• Production of 2D drawings and 3D models.
• Knowledge and application of numerical modelling in solid mechanics.
• Manufacturing of mechanical parts.

Behavioural competencies:

• Working in Teams: building and maintaining constructive and effective work relationships.
• Learning and Sharing Knowledge: sharing knowledge and expertise freely and willingly with others; coaching others to ensure knowledge transfer.
• Bringing the Best out of People: creating a common mind-set and promoting team spirit.

Language skills:

• Spoken and written English, with a commitment to learn French.

Additional Information
Eligibility and closing date:
Diversity

has been an integral part of CERN's mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to our success. We welcome applications from all Member States and Associate Member States .

This vacancy will be filled as soon as possible, and applications should normally reach us no later than 12.08.2026 at 23:59 CEST.
Employment Conditions:
Contract type: Limited duration contract (4 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.

Working Hours: 40 hours per week

Job Flexibility: Fully Onsite

This position involves:

• Work in Radiation Areas.
• Interventions in underground installations.
• A valid driving licence.
• Work during nights, Sundays and official holidays, when required by the needs of the Organization.
• Shift work, when required by the needs of the Organization.

Job grade: 6-7

Job reference: EP-CMS-ID-2026-152-LD

Field of work: Mechanical Engineering

Benchmark Job Title: Mechanical Engineer

Global Benefits

• A competitive salary (tax free), increasing in line with your years of relevant experience.
• 30 days of paid leave per year plus 2 weeks annual closure.
• Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Family, child and infant monthly allowances depending on your individual circumstances.
• A relocation package (installation grant, removal, travel expenses) depending on your individual circumstances.
• Possibility to extend your contract up to 8 years + eligibility for indefinite contract tenure.

Overview of CERN - Discover a world where the impossible is made possible!
At CERN, the European Organization for Nuclear Research, we are pushing the frontiers of science and technology. Our groundbreaking work brings together not only physicists but also a diverse range of professionals from engineering, technical, scientific, and administrative fields. Together, we foster an environment where innovation and collaboration thrive.

Every day, we face exciting new challenges and opportunities to contribute to cutting-edge research that shapes our understanding of the universe. We meet these challenges through the diverse perspectives within our teams, ensuring every contribution is valued and driving our shared sense of inclusion and purpose. Diversity is a core value of CERN since its foundation, and it remains central to our mission and continued success.

If you are ready to be part of a dynamic, inclusive community pushing the boundaries of knowledge, CERN is the place where your curiosity and skills can thrive. Be part of our mission to uncover what lies at the heart of the universe! TAKE PART!
More information about us, here: careers.cern

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